7y + 21 + 2y
9y + 21
multiply 7 with y and 3
collect like terms
Tasuba -- I think you've misread the problem. I don't see any minus signs in the original problem.
The first thing you should do is try to remove the brackets. You can do this by using distributivity. In symbols, this means the following:
a*(b + c) = a*b + a*c
As you can see, the first term of the equation is 7*(y+3)
So, using distributivity, we find that
7*(y+3) = 7*y + 7*3 = 7y + 21
So, the equation can be simplified in the following manner:
7(y+3)+2y = 7y + 21 + 2y
Now, we have to terms with y. if we put them together, we get:
7y + 2y + 21
If we use the formula of distributivity in reverse, we find that:
7y + 2y = (7+2)*y = 9y
So, the equation can be further simplified in the following manner:
7y+2y+21 = 9y + 21
Math - What is 5+7x+2x-3+6 simplified, x+y+4x-3x+2y+3y simplified
derivative - I am finding the second derivative of (x^2)(y^3) = 1 2x(y^3) + (x^2...
Expressions help - I have no idea on how to do this equation please help me. ...
Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
Math - Can 252/1663 be simplified? If it can be simplified, what is the new ...
math - 5x+3y/3x-2y can this be simplified? How?
Implicit Functions - Find the slope of the tangent to the curve at the point ...
CP Algebra - 15y^2-30y-45 ____________ 5y^2+10y-15 this is simplifying ...
Math (Very Easy Math) - I'm kind of confused as to what simplified mean? Can you...
math - simplify the expression, identify the constants, coefficients, and ...